Heatrae Sadia FBM 25 ECO 3KW, Инструкция по установке, эксплуатации и обслуживанию, Страница: 27 / 40

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10.2 Fault codes

All Error Codes must only be cleared once the
problem has been resolved and the water heater has been
powered off for at least 30 seconds and then powered on.
If the error code reappears it is likely that the fault was not
resolved

In all error conditions listed below the water heater
will shut down into a safe condition, will not open the
solenoid valve or apply voltage to the immersion heater.
However, the water heater will remain with power applied,
the ‘power’ on light will remain lit.
Fault / error code Fault Cause of fault Remedy
O C
E1 Indicates that a fault
has been detected by the
Controller linked to the
thermistor
The thermistor is Open
Circuit
Replace the thermistor
O
C
E2 Indicates that a fault
has been detected by the
Controller linked to the
thermistor
The thermistor is Short
Circuit
Replace the thermistor

The top water level sensor, is used to indicate that the water heater has over filled. If
this is triggered, it indicates there is a fault with the heater solenoid valve or the bottom
level sensor. A fault condition where the water levels cannot be controlled correctly, as
a result the water heater will shut down.
O C
E3 indicates that the lower
water level sensor is not
indicating water present,
but the upper sensor is
indicating water present
Lower water sensor is
contaminated with scale
build up
Remove and clean sensor
in accordance with section
9.4, page 22
Lower sensor wiring fault
Check wiring connections
at either end of sensor wire
O C
E4 indicates that the
lower water level sensor
is indicating water present
and the upper sensor is
indicating water present
Top water sensor has
shorted
Check wiring at either end
of the sensor wire and at
control board
Solenoid valve is
permanently letting water
through
Replace solenoid
Upper and Lower sensor
wiring fault
Check wiring connections
at either end of sensor
wires
O C
E5 indicates that the
solenoid valve has been
open for more than 20
minutes, during this period
the lower level sensor has
not detected water
No water supply Check water inlet feed
Filter blocked
Check the condition of the
filter in accordance with
section 9, page 21
Solenoid valve is faulty Replace solenoid
There is a fault with the
main control PCB
Replace main control PCB
O C
E6 indicates that the water
heater is taking too long to
heat
Point of use hot tap has
been left open
Shut off the tap
Check that the electronic
cut out has not been
tripped due to a fault
Turn off the water heater
for a minimum of 30 second
and then reapply the power,
this will reset the cut out
Replace the electronic cut
out
Immersion heater is faulty Replace immersion heater
There is a fault with the
main control PCB
Replace main control PCB